/**
 * Copyright (c) 2013-2022 Nikita Koksharov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.redisson.api;

import java.util.concurrent.TimeUnit;


public interface RSemaphore extends RExpirable, RSemaphoreAsync {

    /**
     * 获得一个或多个 permit
     */
    void acquire() throws InterruptedException;

    void acquire(int permits) throws InterruptedException;


    /**
     * 尝试获得permit
     */
    boolean tryAcquire();

    boolean tryAcquire(int permits);

    boolean tryAcquire(long waitTime, TimeUnit unit) throws InterruptedException;

    boolean tryAcquire(int permits, long waitTime, TimeUnit unit) throws InterruptedException;


    /**
     * 释放一个或多个 permit
     */
    void release();

    void release(int permits);


    /**
     * 信号量的permits数
     */
    int availablePermits();


    /**
     * 清空permits
     */
    int drainPermits();


    /**
     * 设置permits数
     */
    boolean trySetPermits(int permits);


    /**
     * 添加permits数
     */
    void addPermits(int permits);

}
